Deregulatory miRNA-BDNF Network Inferred from Dynamic Expression Changes in Schizophrenia

Area of Science:

• Neuroscience
• Genetics
• Molecular Biology

Background:

• Schizophrenia (SZ) is associated with dysregulated microRNA (miRNA) networks.
• Brain-derived neurotrophic factor (BDNF) is a potential risk gene for SZ.
• Investigating miRNA-BDNF interactions offers insights into SZ pathophysiology.

Purpose of the Study:

• To examine miRNA-BDNF co-expression patterns in peripheral blood of schizophrenia patients.
• To evaluate changes in these patterns before and after antipsychotic treatment.
• To understand the role of the miRNA-BDNF network in SZ onset and treatment.

Main Methods:

• Quantified BDNF mRNA and three specific miRNAs (miR-124-3p, miR-132-3p, miR-206) in blood samples.
• Compared expression levels between 32 SZ patients and 48 healthy controls.
• Analyzed co-expression patterns and their changes after 12 weeks of treatment.

Main Results:

• BDNF expression was significantly lower in SZ patients compared to controls.
• Following treatment, BDNF levels increased, while the three miRNAs decreased.
• SZ patients exhibited positive miRNA-BDNF correlations, which shifted towards negative correlations post-treatment, resembling controls.

Conclusions:

• The miRNA-BDNF network is involved in the pathophysiology of schizophrenia.
• Observed co-expression changes suggest a role for this network in SZ onset.
• Normalization of miRNA-BDNF correlations after treatment indicates therapeutic relevance.